Owner’s manual
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Should I use 87 or 89 gas for lawn mower?
For the Craftsman 917370760 gas walk-behind mower, we use fresh 87-octane unleaded gasoline for normal operation; 89 octane is fine but typically unnecessary unless your engine knocks or your fuel supplier only offers higher octane. Always use clean, fresh fuel and follow the fuel guidance in the 917370760 owner's manual.
What to use (and what to avoid)
- Use fresh, unleaded gasoline from a busy station.
- 87 octane is the standard choice for most walk-behind mower engines.
- 89 octane is acceptable; it does not add power by itself.
- Avoid stale gas (older than about 30 days without stabilizer).
- Avoid high-ethanol fuel when possible; ethanol attracts moisture and can cause hard starting after storage.
Quick comparison
| Fuel choice | When it makes sense | What you may notice |
|---|---|---|
| 87 octane (regular) | Everyday mowing | Normal starting and performance |
| 89 octane (mid-grade) | If you hear pinging/knock under load | Smoother running if knock was present |
| Old fuel or contaminated fuel | Never recommended | Hard starting, surging, stalling |
Storage tip (prevents most “won’t start” problems)
If the mower will sit for more than a few weeks, we recommend treating the fuel and running the engine briefly so treated fuel reaches the carburetor.
- Add fuel stabilizer to the gas can
- Run the mower 5 to 10 minutes
- Store fuel in an approved container
For seasonal storage steps, use how to winterize a lawn mower.
Why it matters
Using the right fuel helps prevent varnish buildup in the carburetor, reduces starting problems, and keeps the engine running consistently at mowing speed.
Last updated: February 2026
What are the common problems with Craftsman lawn mowers?
On the Craftsman 917370760 walk-behind mower, the most common problems we see are loss of power, uneven cutting, excessive vibration, a starter rope that’s hard to pull, and self-propel drive issues (hard to push or loss of drive). The troubleshooting chart in the 917370760 owner's manual matches these symptoms and points to the usual causes.
Most common symptoms and what typically causes them
- Loss of power: cutting height too low, mowing too fast, dirty air filter, grass buildup under the deck, or oil level issues
- Poor cut or uneven cut: dull/bent blade, uneven wheel height settings, deck packed with clippings
- Excessive vibration: loose or damaged blade, damaged blade adapter, or (more serious) a bent crankshaft
- Starter rope hard to pull: blade dragging in grass, blade or adapter problem, or brake engagement issues
- Hard to push or won’t move (self-propel): debris in rear drive wheels, worn drive components, belt or transmission wear
Quick checks we recommend before buying parts
- Shut off the engine and disconnect the spark plug wire before working near the blade.
- Tip the mower safely and clean packed grass from under the deck.
- Confirm all wheel height adjusters match side-to-side.
- Check the rear drive wheels spin freely; if not, clean the wheel area.
- Inspect the blade and mounting hardware for looseness or damage.
Parts that commonly solve these issues on model 917370760
| Symptom | Common wear item | Example part for this model |
|---|---|---|
| Uneven cut, poor cut, vibration | Blade | Lawn mower 21-in deck mulching blade 532406706 |
| Vibration, blade won’t stay tight | Blade mounting component | Lawn mower blade adapter 532421176 |
| Mower won’t move or slows down | Ground drive belt | Belt.rgd.vs 532406580 |
| Hard to push, drive slips | Transmission wear | Transmission 532404844 |
Why it matters
These problems are more than convenience issues. A dull blade can tear grass (stressing your lawn), grass buildup can reduce airflow and power, and vibration can signal a loose blade or damaged adapter that can quickly lead to bigger repairs.
Helpful DIY guidance
- For blade service steps and safety tips, use the 917370760 owner's manual.
- If blade removal is the sticking point, see lawn mower blade removal tool.
Last updated: February 2026
What model number is the Craftsman 917370760?
The model number is 917.370760; it’s the Craftsman rotary lawn mower model shown on the identification information in the 917370760 owner's manual. This is the number you should use when ordering walk-behind mower parts like blades, drive components, and control cables.
Where to find the model number on the mower
We recommend confirming the model number directly on the mower before ordering parts.
- Check the model tag or decal on the mower deck (often near the rear discharge area).
- Look around the handle mounting area and rear housing.
- If the decal is worn, use the model number printed in your manual.
- Match the full model number including punctuation (917.370760).
Why the exact model number matters
Craftsman walk-behind mowers can look similar across years, but parts can differ by model. Using 917.370760 helps ensure the correct fit for common replacements such as:
- Blade and blade mounting hardware
- Drive system parts (belt, pulleys, transmission)
- Operator presence and drive control cables
- Wheel height adjuster components
Examples of model-matched parts (from this model’s parts list)
| Part type | Example part for model 917.370760 | What it affects |
|---|---|---|
| Blade | Lawn mower 21-in deck mulching blade 532406706 | Cut quality and mulching |
| Operator presence cable | Lawn mower zone control cable 532191221 | Engine run/stop safety control |
| Drive belt | Belt.rgd.vs 532406580 | Self-propelled movement |
Quick check: model number vs. other numbers
| Number type | What it looks like | What it’s used for |
|---|---|---|
| Model number | 917.370760 | Finding correct Craftsman mower parts |
| Engine model/type/code | Varies (Briggs & Stratton) | Engine-specific parts like carburetor or ignition |
| Part number | Varies by part | Ordering a specific replacement part |
Why it matters
Ordering by the correct model number prevents mismatched parts, reduces downtime, and helps you get the right blade, cable, or drive components the first time.
Last updated: February 2026
What model number is the Craftsman 917370760?
The model number for this Craftsman walk-behind rotary mower is 917.370760 (often written without the dot as 917370760). You can confirm it on the mower’s model tag and in the 917370760 owner's manual.
Where to find the model number on the mower
Most Craftsman walk-behind mowers list the model number on a product label (model tag). Check these common spots:
- Rear of the deck near the discharge door
- Top of the deck near the engine mounting area
- Between the rear wheels on the deck housing
- On the handle support area (varies by build)
Why the dot matters (917.370760 vs 917370760)
Both formats refer to the same mower; the dot is just a formatting style used in manuals and parts lists.
| You might see it as | What it means | When it’s used |
|---|---|---|
| 917.370760 | Same model number | Common in printed manuals and diagrams |
| 917370760 | Same model number | Common in online parts lookups |
Why it matters when ordering parts
Using the exact model number helps us match the correct diagrams and parts for your mower’s drive system, deck, and controls.
- Ensures the correct 21-in blade and blade adapter fit
- Helps match drive components like the transmission and belt
- Prevents ordering the wrong cable or handle hardware
If you are replacing common wear items, match the part to the diagram in the manual first; for example, the lawn mower 21-in deck mulching blade 532406706 is listed for this model.
Quick tip: confirm the engine label separately
Your mower’s engine (Briggs & Stratton 675 Series) has its own model/type/code on the engine shroud. That engine label is used for engine-specific parts (carburetor, ignition, recoil starter), while 917.370760 is used for mower chassis and drive parts.
Last updated: February 2026
What model number is the Craftsman 917370760?
The model number for this Craftsman walk-behind mower is 917.370760 (often written without the dot as 917370760). You can confirm it on the mower’s model label and in the 917370760 owner's manual.
Where to find the model number on the mower
Most Craftsman walk-behind mowers list the model number on a product ID label. Check these common spots:
- On the rear of the deck near the discharge opening
- On the top of the deck near the engine mounting area
- Near the handle mounting brackets
- On a label that also lists engine information (Briggs & Stratton details)
Why the dot matters (917.370760 vs 917370760)
Both formats refer to the same mower; the dot is a formatting style used in many manuals and labels.
| You might see it as | What it means | When it’s used |
|---|---|---|
| 917.370760 | Same model number | Common in printed manuals and decals |
| 917370760 | Same model number | Common on parts sites and search fields |
Why it matters when ordering parts
Using the exact model number helps us match the correct illustrated parts list and avoid ordering the wrong blade, cable, or drive components.
- Confirms the correct 21-inch deck parts (blade, adapter, hardware)
- Matches the correct drive system parts (belt, transmission, control assembly)
- Helps identify the right handle and control components
Related parts you may see listed for this model
If you are verifying you are on the right parts list for Craftsman 917370760, these part names commonly appear for this mower:
- Lawn mower 21-in deck mulching blade 532406706
- Operator presence or zone control cable
- Drive control assembly and ground drive belt
Last updated: February 2026
What years did they make the Craftsman 917370760?
Craftsman model 917.370760 is a specific rotary mower model number (675 Series Briggs & Stratton, 21-inch Multi-Cut, power-propelled). Model numbers like this identify the exact configuration, but they do not map to one universal “made in year” range; the most reliable way to confirm the production timeframe is to use the identification details and documentation for 917370760 in the 917370760 owner's manual.
How to pinpoint the year for model 917370760
We recommend using these practical checks because they tie to your exact mower, not a similar Craftsman model family:
- Check the model and serial label on the mower deck or rear housing; record the serial number exactly.
- Compare your mower’s features to the manual description (21-inch deck, power-propelled, operator presence control).
- If your engine has its own ID tag (Briggs & Stratton), record the engine model and code; that code is commonly used to date the engine.
- Match key assemblies to the illustrated parts list to confirm you are working from the correct revision.
- Keep the serial number with your maintenance records for future parts lookups.
Parts-list clues that confirm you have the right model
The manual’s parts breakdown for Craftsman ROTARY LAWN MOWER model 917.370760 lists components that should match what’s on your mower. For example, these are common identifiers:
| What you see on the mower | Example part name | Example part ID |
|---|---|---|
| 21-inch mulching blade | Lawn Mower 21-in Deck Mulching Blade | 532406706 |
| Blade mounting hub | Lawn Mower Blade Adapter | 532421176 |
| Operator presence cable | Lawn Mower Zone Control Cable | 532191221 |
If you’re replacing wear items while you’re confirming the model, using the exact part ID helps avoid fit issues (for example, the lawn mower 21-in deck mulching blade 532406706).
Why it matters
Craftsman “917” model numbers cover many walk-behind mowers across multiple years. Confirming the exact 917370760 identification prevents ordering the wrong blade, blade adapter, drive belt, or control cable, and it keeps maintenance specs aligned with your mower.
Last updated: February 2026
